When is the best time to have sex according to ovulation strips

Hannah • Psalm 16:6 💛 ‭‭Isaiah‬ ‭54:2‬

Ok so I’m very confused. I thought the best day to have sex was when the line is very solid. Not when it’s fading. We have been trying for a year and I’m new to this app, but now I feel like I’ve been looking at these strips wrong!